Leverage and margin — mechanics and risk

Leverage is the feature that makes retail trading possible with a small account — and the feature that wipes out more small accounts than any other. The problem isn't leverage itself. It's that most beginners misunderstand what it does. This lesson walks through the mechanics step by step, with the numbers your platform shows you, so you can use leverage deliberately instead of being used by it.

What you'll learn

• What leverage and margin are, and how they relate
• How to calculate the notional value of a position and the margin it requires
• What balance, equity, free margin, and margin level mean on your platform
• How margin calls and stop-outs work — with a worked example
• Why leverage sets how big a position you can open, while position size sets your actual risk

1. Notional value: what you're really controlling

When you open a trade, you control a position worth far more than the money in your account. That full value is the notional value.

(Illustrative.) 1 standard lot of EUR/USD = 100,000 euros. With EUR/USD at 1.0850:

• Notional value = 100,000 × 1.0850 = $108,500

You don't need $108,500 to open this trade. You need only a deposit — the margin.

2. Leverage and margin

• Margin is the deposit your broker sets aside to keep a position open. It isn't a fee — it's returned when you close the trade.
• Leverage is the ratio between the position size and the margin required.

Required margin = notional value ÷ leverage

Leverage limits depend on your broker and your regulator. For example, in the EU and UK, retail clients are generally limited to 30:1 on major currency pairs, 20:1 on non-major pairs, gold, and major indices, 10:1 on other commodities, 5:1 on individual shares, and 2:1 on cryptocurrencies. Other jurisdictions allow much higher leverage.

3. The key insight: leverage doesn't change your risk per pip

This is the part most beginners miss.

A 1-lot EUR/USD position is worth $10 per pip whether you opened it with 1:30 or 1:500 leverage. A 20-pip move against you costs $200 either way.

What leverage changes is how big a position you are allowed to open with the money in your account. Higher leverage makes it possible to open positions that are far too large for your account — and that's where the danger lies.

4. Reading your account: balance, equity, margin

Your platform shows several numbers. Here's what they mean:

5. Margin calls and stop-outs

Brokers set two thresholds based on margin level (the exact levels vary by broker and regulator — check yours):

• Margin call (for example at 100%): a warning. You typically can't open new positions.
• Stop-out (for example at 50%): the broker starts automatically closing your positions, usually largest loss first, to stop your account going negative.

Worked example: how an over-leveraged account dies

(Illustrative. Assumes 1:500 leverage, margin call at 100%, stop-out at 50%.)

A trader deposits $1,000 and opens 1 standard lot of EUR/USD at 1.0850.

An 89-pip move — which EUR/USD can make in a single busy day — has cost this trader almost 90% of their account. The trade idea might even have been correct in the end. It doesn't matter: the position was far too big to survive a normal move.

Now compare a trader with the same $1,000 who opens 0.05 lots ($0.50 per pip):

• The same 89-pip adverse move costs $44.50 — about 4.5% of the account.

Same market, same leverage available, same move. The only difference is position size.

6. Other things to know

• Negative balance protection: in some jurisdictions (for example the EU and UK for retail clients), brokers must ensure you can't lose more than your account balance. Elsewhere, a large gap could leave you owing the broker money. Check your broker's terms.
• Margin requirements can change. Brokers often raise margin requirements before weekends, holidays, or major events.
• Different instruments, different leverage. Gold, indices, and crypto usually have lower maximum leverage than major forex pairs.

Common beginner mistakes

• Sizing positions to "use" the available margin, instead of to a fixed risk.
• Confusing balance with equity — balance can look fine while equity is collapsing on open trades.
• Choosing the highest leverage on offer without understanding it only increases the maximum position size.
• Ignoring the margin level until the margin call arrives.
• Holding big positions through weekends or news when margin requirements and gap risk both rise.

Key terms

Practice

1. Find your broker's leverage for EUR/USD and XAU/USD, and its margin call and stop-out levels.
2. Calculate the notional value and required margin of a 0.10-lot EUR/USD position at the current price.
3. On your demo account, open a 0.10-lot position and find the equity, used margin, free margin, and margin level figures on your platform.
4. Using your real (or planned) account size, calculate how many pips against a 1-lot position would trigger a stop-out. Then do the same for 0.05 lots.

Quick recap

• Leverage lets you control a large notional value with a small margin deposit.
• Leverage does not change risk per pip — position size does.
• Watch equity and margin level, not just balance.
• Margin calls and stop-outs are last-resort mechanisms, not risk management.
• Size every trade from your planned risk and stop-loss — the subject of the next module.

Next up: Module 1.4 — Risk Basics.